Dwarf planet

Dwarf planets were astronomical objects that, while having sufficient mass and gravity to be spherical, were too small to be considered true planets. Dwarf planets were extremely common, often outnumbering proper planets in their host star systems.

Properties
Dwarf planets were categorized as being large enough to be spherical but smaller than 0.01 SPM.

Dwarf planets formed by the same process as true planets, however on a smaller scale producing a smaller object. Usually, dwarf planets had too little gravity to sustain an atmosphere, and too little mass to maintain geological activity or a magnetic field.

Due to this, dwarf planets rarely contained liquids like water, and life baring dwarf planets were very rare.

The gravity of dwarf planets was very weak compared to planets, often allowing for relatively meager propulsion mechanisms to launch a vehicle into orbit. Due to this, they were popular as mining colonies, as it was easy to extract minerals from them and lift the minerals into space.